Wireless Sensor Network Market to Reach $1Billion
(San Francisco Chronicle) - Scattered throughout John James' horse ranch in the Santa Cruz mountains are wireless sensors he uses to measure temperature and humidity.
Inside the sensors, communication devices the size of a quarter, called nodes, send streams of messages to each other, conveying the temperature and humidity information to a base station in James' house.
The nodes wake up, relay data from one to another, synchronize their clocks and then fall back to sleep. They sleep 99.5 percent of the time, allowing their batteries to last up to five years.
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Inside the sensors, communication devices the size of a quarter, called nodes, send streams of messages to each other, conveying the temperature and humidity information to a base station in James' house.
The nodes wake up, relay data from one to another, synchronize their clocks and then fall back to sleep. They sleep 99.5 percent of the time, allowing their batteries to last up to five years.
More...
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